unable to login to doccano

```
requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8000): Max retries exceeded with url: /v1/auth/login/ (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 111] Connection refused'))
[2023-07-07, 06:31:17 UTC] {taskinstance.py:1345} INFO - Marking task as UP_FOR_RETRY. dag_id=order-letter_NER, task_id=manual_review_task, execution_date=20230707T062658, start_date=20230707T063112, end_date=20230707T063117
[2023-07-07, 06:31:18 UTC] {standard_task_runner.py:104} ERROR - Failed to execute job 338 for task manual_review_task (HTTPConnectionPool(host='localhost', port=8000): Max retries exceeded with url: /v1/auth/login/ (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 111] Connection refused')); 455)
```
I'm using doccano-client==1.2.7